< Strong body. Quiet head. >

For men aged 35+ who want to be stronger both physically and mentally.
With outdoor training, coaching and data, we build energy, discipline and resilience.
Behaviour change based on laws of nature, performance and data.

View the offer

Smart training

Train by energy, stress and recovery.

Strong routines

Build habits that fit your work, family and life.

Train outdoors

Train in nature and build physical and mental resilience.

Do you recognise this?

Many men over 35:

  • Have less energy
  • Recovering poorly
  • Training without structure
  • Functioning under constant pressure

This can be different! Inside 37degreez We work through outdoor training, coaching & data (HRV) to:

  • Force
  • Recovery
  • Mental focus
  • Stress regulation
View the offer

The Kings Path

Consistency. Strength. Discipline.

12 weeks where you stop "starting" and start building. Training twice a week. Coaching on behaviour. Measurable progression.

You no longer walk after yourself. You are walking your path.

  • 1 or 2x a week for 12 weeks
  • Intake Call (30 min) + FREE personality test €37 (based on this we discuss what suits you best)
  • Stronger body
  • More energy
  • Better focus
  • Greater control over stress

1. What does it entail?

  • Essential: 1x Performance: 2x per week targeted training
  • Personal plan
  • Weekly coaching
  • Progression measurement
  • Behavioural structure


2. What problem does it solve?

  • Lack of discipline
  • No measurable progression
  • Half training, half motivation
  • No system


3. What will it deliver and within what timeframe?

Within 12 weeks:

  • Visible physical progression
  • More strength & fitness
  • Better focus
  • Consistent training routine


You stop starting. You build.

Schedule an intake

< What others say >

Lukas van Welten
The Kings Path 12-week Programme
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Marc first conducts a comprehensive exploratory interview to know exactly how he can best help you achieve your goals. He is knowledgeable about exercises for specific muscle groups and figure, as well as nutrition and a healthy lifestyle in the full sense of the word. He is good at writing out a varied movement, exercise and eating plan, and showing and explaining how to perform individual exercises correctly and safely. By working with Marc, you will improve your stamina, strength and health.
Jos Verstappen
The Kings Path 12-week Programme
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Marc is a fine personal trainer! In the first period, he not only looks at exercises, but also at nutrition and other things that affect health. From that comes a tailor-made training schedule, in my case one for strength and HIIT for fitness. And life tips such as "take the bike more". One of my goals was to exercise more often and get fitter. So far, I have definitely succeeded!
Martijn van Tilburg
The Kings Path 12-week Programme
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Together, Marc sets up a personal and targeted plan with you. He gives you good advice and also puts more focus on your health in general. He really takes the time for you, so he really knows how to motivate you.
Ron Rutter
The Kings Journey Annual Programme
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What is enormously nice about training Marc is that he really takes the time to tailor a personal programme to you. Both physically and mentally. Training outdoors is very nice. Plus point: he simply takes the weights and kettlebells with him
Subahan Tac
The Kings Journey Annual Programme
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I enjoyed training with Marc for over a year. I was able to learn a lot in terms of sport, lifestyle and mindset. I am very grateful to him for that. Marc is proactive, knowledgeable and motivated to help his clients reach their goals. Thank you too for your time and again so much for everything I said at the end of the training. You genuinely helped me move forward.
Maarten Jansen
Outdoor experience event
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Muscle pain in places where I thought there were no muscles. Still reminiscing two days after training with Marc, wonderful experience, highly recommended
Theo Martens
Outdoor experience event
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The outdoor experience was a great experience. The training was intensive for the mind and body but after the experience it was totally worth it. We went home with a good feeling.
Maarten van Veen
Outdoor experience event
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Great day in the Oirschot woods with Marc. Definitely recommended!
Jorrit van Willigen
Outdoor experience event
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Short powerful . And very intense, would definitely want to do something like that annually though, the outdoor Experience, and Marc is very open and approachable. Highly recommended!
Ruud
The Kings Path 12-week programme
Read More
Through a chance meeting with Marc, I got deeply involved in conversation. Business, private, thoughts, feelings and body, everything came up. After more than 12 years of no sport, no focus and always following the same pattern, hugely fundamental changes were felt and visible in just a few weeks. Getting fitter is only a small part for me. Especially the conversations, the mirror that Marc knows how to hold up in combination with the data from the personality test and the HRV measurement put me on a totally different track. It feels like a reset. Definitely an investment in yourself that will pay off!

About Me

Hey topper, my name is Marc, welcome to 37degreez.

We work with men who want to take responsibility for their energy, body and leadership. Not for a day, but for the long term.

In our training and coaching, we combine strength training, stress management, behavioural change and data-driven insights (such as HRV and recovery monitoring). No boot camp or gym culture, but systems that work.

We work mostly with men 35+ (entrepreneurs and professionals) who carry a lot: work, family and responsibility. Often they are not lazy, but overloaded and lack a clear system that fits their lives.

37degreez stands for the core of human functioning: 37 degrees. Your foundation.

Train your strength. Tame your brain. Get back to your nature.

Get in touch

I will get back to you as soon as possible!

About 37degreez

37degreez helps men who carry a lot to regain leadership over their physical and mental health.

As part of a broader health revolution, we work with people who want to take responsibility for themselves, their energy and their environment.

Via outdoor training and coaching in and with nature we combine physical challenge with mental acuity.

We reduce stress, restore balance and build sustainable strength.

We work data-driven (including with measurements around stress and recovery), so that choices are not based on feelings alone, but on insight.

Not harder.
More conscious, stronger and with more direction, though.

In association with:
🤝🏻 Personality.co.uk
🤝🏻 Taste Wollerich
🤝🏻 ALS Foundation Netherlands
🤝🏻 Trees for all Foundation

Photos/videos:

  • Isabella Verduyn Photography.
  • LINK Photography.
  • New Seals Productions.

SOCIAL

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CONTACT details

Marc de Winter
Mail: marc@37degreez.com
Whatsapp: +31- 6- 48 40 05 30
KVK 72689870

SBI codes
– 85592
Corporate education & training
– 85599
Tutoring, training & education

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37degreez runs on SYS Platform SYS Platform - Website platform for ambitious entrepreneurs